What the 350 A AC-1 rating means for fit
The LC1F2654X7 is a 4-pole (4 NO) contactor from the TeSys F range, rated 350 A at ≤440 V in utilisation category AC-1 — that is the resistive-load curve, not motor starting. The AC-1 rating governs continuous current through resistive heaters, lighting banks, or transformer primaries where inrush is low. For motor duty (AC-3), this contactor is not the right pick; the 350 A figure applies only to the AC-1 band per IEC 60947-4-1. Power dissipation runs 37 W per pole in AC-1 service, with total heat rejection of 8 W from the coil at hold-in. The control circuit is AC 550-600 V at 40-400 Hz, with an inrush of 650 VA dropping to 10 VA sealed.
Mounting and integration constraints
Mounts to a plate — no DIN-rail clip on this frame. Dimensions are 8.4 in deep by 9.6 in wide by 8.0 in high (213 x 244.5 x 203 mm). Power connections are bolted bar (32 x 4 mm) or lug-ring terminals accepting up to 240 mm² cable. Control wiring uses screw-clamp terminals sized for 1-4 mm² flexible or solid. Tightening torque: 1.2 N·m on the control circuit, 35 N·m on the power circuit. Operating altitude is 3000 m without derating; storage temperature range -60 to 80 °C.
Protection coordination and ratings
Associated fuse rating is 315 A aM or 400 A gG at ≤440 V. Rated breaking capacity is 2120 A per IEC 60947-4-1. Insulation voltage is 1000 V per IEC 60947-4-1, 1500 V per VDE 0110 group C. Overvoltage category III. Mechanical durability is 10 million cycles; maximum operating rate is 2400 cycles per hour at 55 °C. Operating time: 40-65 ms closing, 100-170 ms opening. Protective treatment is TH (tropicalised) for humid environments.